William best



N0. 6|0,5l|. Patented Sept. 6, I898. W. BEST.

MINERS SAFETY LAMP.

(Application filed Dec. 23, 1897.) (No Model.)

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and E is a spring which, in conjunction with UNITED STATES WILLIAM BEST, on MORLEY, ENGLAND, ASSIGNOR To TIIE ACKROYD & BEST, LIMITED, OF sAME PLAoE.

MIN ERS SAFETY-LAM P.

SPECIFICATION forming part of Letters Patent No. 610,511, dated September 6, 1898.

Application filed December 23, 1897. Serial No. 663,119. (No

To all whom it may concern.-

Be it known that I, WILLIAM BEST, a subject of the Queen of Great Britain and Ireland, and a resident of Morley, near Leeds, in the county of York, England, have invented certain new and useful Improvements Connected with Miners Safety-Lamps, (for which I have obtained a patent in Great Britain, No. 23,127, bearing date December 3, 1895,) of which the following is a specification.

The object of this invention is to construct locks and unlocking apparatus for miners safety-lamps in such a manner that the said lamps may only be unlockedby the said apparatus, and any workman or other unauthorized person attempting to unlock the lamp by mechanical means will be effectually prevented from doing so.

In the drawings, Figure 1 is a sectional elevation of a lamp fitted with a lock constructed according to my invention, and Fig. 2 is a sectional elevation of an unlocking appara tus drawn to a smaller scale than Fig. 1.

A is the frame of the lamp, and B is the lamp-bottom, which is connected to the frame A by means of the screw-thread C.

D is a bolt situated in the lamp-bottom B,

the head F, tends to keep the bolt D in the up position. The head F engages with a rack G, the teeth of which slant in one direction, so as to enable the lamp-bottom to be screwed home and to effect the locking without the assistance of outside apparatus. The bolt D is provided with an enlarged head H, which works in a recess J in thelamp-bottom B, and it will be seen that when the lamp is looked, as seen in the drawings, it is impossible to tamper with it, as the head H is at the end of the recess and out of reach of any mechanical tool.

The unlocking apparatus for withdrawing the bolt D, which is illustrated at Fig. 2, is constructed in a box K, having a separate compartment L for the reception of abattery M, and wires N and P from the said battery are connected to a magneticcoil R, the wire P passing by way of a push-switch S. A magnet T from the coil R projects througha ring U, which latter is of such a diameter as model.) Patented in England December 3, 1895, No. 23,127.

to receive the lamp-bottom B, and the push S also passes through the ring U. The coil R and magnet T are carried on the end of a sliding rod W, the lower end of which is connected to a treadle V, and Y is a spring which bears against a bracket Z and tends to keep the sliding rod IV and parts connected with same in an up position.

When it is required to unlock a lamp, the lamp-bottom is placed in the ring U, the magnet-pole T entering the recess J and coming into contact with the head II of the bolt D, which is to be of magnetic material, while at the same time the base of the lamp-bottom B comes in contact with and depresses the push switch S, thus completing the circuit through the battery M, wire N, coil R, and wire I andstronglymagnetizingthemagnetT. The magnet thus takes a firm hold on the head II of the bolt D, and on the depression of the treadle V the sliding rod W is lowered, taking with it the magnet T and the bolt D, when the frame A is released and may be unscrewed from the lamp-bottom B.

I am aware that a magnet has been applied to movea latch and allow the partsof the lamp to be separated, and in some instances the magnetism has held the latch out of action. In other cases it had to be sufficiently powerful to give motion to the latch, and in other cases the lamp had to be moved away from the magnet and its poles. In the present instance the magnetic pole is brought directly into contact with the magnetic material of the bolt, and an extraneous force or power is made use ofin moving the pole and the bolt without disturbing the lamp.

I claim as my invention 7 l. The combination with a miners safetylamp having two parts connected together and abolt for holding the parts in position, of a magnet-pole adapted to be brought into direct contact with the bolt, and means for giving motion to such magnet-pole and withdrawing the bolt, substantially as specified.

2. The combination with a miners safetylamp having the parts screwed together and a spring-bolt of magnetic material that prevents the parts unscrewing, of a magnet-pole adapted to be brought into direct contact with the bolt and a lever and rod for depressing the magnet-pole and withdrawing the bolt, magnet T, Wires forming the required con- 10 substantially as specified. nections, and a sliding rod W operated by a 3. The combination with a miners safetytreadle V for depressing the magnet T and lamp, in which a spring-bolt is employed havwithdrawing the bolt D in the lamp, substan- 5 ing a countersunk head, of an electromagtially as set forth.

netic unlocking apparatus consisting of a box WILLIAM BEST. K, carrying a battery M, a ring U having a Witnesses: push-switch S and magnet T projecting in GRIFFITH BREWER,

same, a coil R for electromagnetizing the JOHN JOWETT. 

